Chalcogenide glasses in the pseudo-ternary CdTe–AgI–As 2 Te 3 system were synthesized and the glass-forming range was determined. The maximum content of CdTe in this glass system was found to be equal to 15mol.%. The macroscopic characterizations of samples have consisted in Differential Scanning Calorimetry, density, and X-ray diffraction measurements. The cadmium telluride addition does not generate any significant change in the glass transition temperature but the resistance of binary AgI–As 2 Te 3 glasses towards crystallisation is estimated to be decreasing on the base of ΔT=T x −T g parameter. The total electrical conductivity σ was measured by complex impedance spectroscopy. First, the CdTe additions in the (AgI) 0.5 (As 2 Te 3 ) 0.5 host glass, (CdTe) x (AgI) 0.5−x/2 (As 2 Te 3 ) 0.5−x/2 lead to a conductivity decrease at x≤0.05. Then, the behaviour is reversed at 0.05≤x≤0.15. The obtained results are discussed by comparison with the equivalent selenide system.